[PM-13362] Add private key regeneration endpoint (#4929)

* Add new RegenerateUserAsymmetricKeysCommand

* add new command tests

* Add regen controller

* Add regen controller tests

* add feature flag

* Add push notification to sync new asymmetric keys to other devices

src/Core/KeyManagement/KeyManagementServiceCollectionExtensions.cs

@@ -0,0 +1,18 @@
+using Bit.Core.KeyManagement.Commands;
+using Bit.Core.KeyManagement.Commands.Interfaces;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Bit.Core.KeyManagement;
+
+public static class KeyManagementServiceCollectionExtensions
+{
+    public static void AddKeyManagementServices(this IServiceCollection services)
+    {
+        services.AddKeyManagementCommands();
+    }
+
+    private static void AddKeyManagementCommands(this IServiceCollection services)
+    {
+        services.AddScoped<IRegenerateUserAsymmetricKeysCommand, RegenerateUserAsymmetricKeysCommand>();
+    }
+}